engine:Trusted Compute Pools - Open Attestation integration with oVirt engine

Detailed description: http://wiki.ovirt.org/Trusted_compute_pools

Enhance Notification service to recognize the new events added in TCP feature.

Change-Id: I8d0314ac61b9f84ff6c2a21ec9dc711f7bb9b5e1
Signed-off-by: Gang Wei <gang.wei@intel.com>
Signed-off-by: Emily <lijuan.zhang@intel.com>